SYSE.5:5.1 - Small Wrong-Use Check

A service machine uses one lubricant cartridge and one cleaning-solvent cartridge. Cross-connection damages seals. The engineer states the two fluid-delivery contributions and service conditions, then compares candidate cartridges, ports, seals, and connection arrangements. The retained proposal uses mechanically distinct keyed couplings whose materials and geometry fit the relevant fluids, pressure, assembly, and service conditions.

The check attempts every intended connection and the consequential swapped connections under the declared conditions. A colour label is a cue, not evidence that cross-connection is impossible. If an intended connection fails or a damaging swap remains possible, the allocation and interface proposal reopens. The resulting observations can support claims only about the tested configurations and wrong-use cases.